There are many reasons why babies sweat at the back of the head: first, babies spend most of the time lying down, usually after eating milk or crying, will cause babies to sweat, because the back part of the head lying down does not dissipate heat, so the back of the head sweat more. The second, caused by calcium deficiency, the most obvious symptoms of calcium deficiency is sweating, easy to wake up at night, pillow baldness, etc. This situation should be tested for trace elements, according to the results to do the corresponding supplement. The third kind, caused by indigestion, usually feed the baby too much at a time, the interval is too short, can cause the baby to accumulate food, accumulation of food will cause fever, will cause the whole body to sweat, so the back of the head will also sweat. The fourth kind, the cold, fever or pneumonia caused by the body temperature rise, will also appear this situation.